Process of applying pain-removers.



No. 875,163. PATENTED DEC. 31, 1907. G. ELLI-S. PROCESS OF APPLYING PAINT REMOVERS.

APPLICATION FILED AUG 6, 1907.

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Simian/5oz CARLETON ELLIS Me A - plying substances UNITED @IATES PATENT OFFICE,

OARLETON ELLIS, OI LAROIIMONT,

NEW YORK, ASSIGNOR TO OHADELOID CHEMICAL COMPANY, OF NEW YORK, N. Y., A CORPORATION OF WEST VIRGINIA.

PROCESS OF APPLYING PAINT-REF/IOVEBS.

Specification of Letters Patent.

Patented Dec. 31, 1907.

Application filed August 6 1907- Serial N0. 387,275-

have invented a new and useful Improvement in the Process of Applying Paint-Itemovers, of which the following is a specification.

My invention relates to a method of apof a liquid or semi-liquid consistency to painted or varnished surfaces to soften or dissolve the finish coating thereon, and thus torender possible the ready removal of the same.

All classes of liquid removers come within the scope of my invention, acid, alkaline and neutral, but I have in mind more particularly in this connection the use of neutral removers which depend for their efiiciency upon the presence of volatile solvents. Hitherto it has been customary to apply such removers to surfaces by the agency of an ordinary paint brush. The disadvantages of this method are obvious. The use of an un covered can and the necessity of moving the brush frequently to and from the can to obtain fresh amounts of the remover and apply the same to the surface being treated are sources of continual loss of the volatile solvents by evaporation. The necessity also by this method of applying the fresh amounts of remover to the exterior rather thanthe interior of the brush accentuates the loss by evaporation. By my invention I avoid all of these disadvantages. To accomplish this end, my remover, which con- 'sists of one or more volatile solvents, such asbenzol, alcohol, etc., and preferably a thick ening material more or less. soluble therein, as wax, which may be present in a minimum quantity of 3 or 4 per cent.,'is forced under pressure in any desired manner, as by means of air pressure or a hydraulic head, into the interior of a curtained sprayer or atomizer.

' The curtain of the device is designed to be brought into contact with the surface to be treated. In this position it effectively prevents any loss of the remover by splashing or evaporation, and at the same time operates to smooth out and render the layer of liquid of a uniform thickness on the finish coated surface. It will be seen that in a process of this character, the curtained sprayerbeing directly connected by a flexible hose to a covered supplytank, all evaporation and loss of the solvent is effectively prevented. So that, as a consequence, the paint remover when it reaches the surface to be treated contains all of even its most volatile constituents and is thus in a condition to most effectively and most rapidly soften the finish coating being operated upon.

I construct the curtain above referred to either out of bristles which of course would have a maximum smoothing effect, or out of a woven fabric, rendered impervious to fluids or not, as may be desired, which would have a maximum evaporation retarding effect, but preferably out of a combination of the two. That is" to say, I provide various forms of bristle brushes, the layers of bristles of which are retained in position and at the same time assisted in the retarding of evaporation by outer curtains of woven fabric.

I have hereinafter described the details of my process, and I have shown the structure of the apparatus which I use in carrying out the same, in the accompanying drawings, in which Figure 1 is a vertical cross-sectional view of my preferred brush; Fig. 2, a similar section of another form of brush; Fig. 3, a horizontal cross-section of the brush shown in Fig. 2; Fig. i, a horizontal cross-section of 'Fig. 1; Fig. 5, an elevation, showing a different arrangement of the curtains in the brush; Figs. 6 8c 7, vertical cross-sections of still other arrangements of the curtains; and Fig. 5, a view of the entire apparatus on a very much smaller scale.

In Figs. 1 and 4, I indicates a brush handle having a longitudinal channel 2 therein, provided with a gate-valve 3. The channel 2 o ens into a horizontal chamber i, located in t e cylindrical brush stock 5, which is screwthreaded to the handle 1. This chamber is provided with a number of circularly arranged vertical outlets or nozzles 6 and a centrai outlet 6, the mouths of which are flared, as at 7. In the spaces between the circularly arranged outlets are located a number of con centric annular curtains, each one of which consists of'jan outer layer of fabric 8, rendered impervious to liquids or not, as may be desired, and preferably of a woven character, such for example, as hair-cloth, and inner annular layer of bristles 9. Wherever I use bristle curtains, however, I take care to con struct them in such a way as to produce a solid continuous wall of bristles.

Figs 2 & 3 show another modification difi ferlng 1n that there is only a single curtain of fabric and bristles which in this case is flattened at 10 and tapered at its lower end 11, and in the fact that the outlets 12 are located in a straight line instead of circularl These outlets are connected to the main longitudinal channel by a horizontal chamber similar in construction to that in Fig. 1. r

Fig. 2 shows the detailed construction of the valve 3, which is an ordinary gate valve provided with the valve-plate 13 sliding in the chamber 14 and connectedto the spring retracted button 15 by means of the rod 16 passing through a stuffing box 17.

Fig. 5 shows an external view of either a cylindrical or fiattenedbrush such as those shown in the preceding figures, but with the outer fabric curtain 18 shortened. 1

Fig.- 6 shows a cylindrical brush identical in construction with the brush in Fig. 1, but the curtains 19 of which are made of bristles alone.

Fig. 7 shows a brush of the same character, but with the curtains 20 made entirely of fabric.

Fig. 8 shows the entire ap aratus used for applying the remover. In t 's figure, 21 is a pressure su ply-tank for the liquid remover, 22 a flexib e hose made of some material which is not affected by the volatile solvents, such as metal, and 23 the curtained s rayer or atomizer for applying the material dlrectly to surfaces.

' In operation the process is carried out briefly as follows: The liquid remover being supplied by pressure from the tank 21 to the any desired quantity, according to t e eX-' tent to which the valve has been opened by the o erator, into the horizontal chamber 4 and t ence through the nozzles 6, 6 where the material is sprayed or atomized and projected upon the surface being treated. The

bristle curtains are especially advantageous .in producing a layer of remover of an even thickness owing to their effective spread ng action. The other curtains made of fabric are useful as they more effectively prevent the evaporation of the volatile ,solvents. In

. order to secure the advantages .of both .of

these, I have constructed the preferred modification of the. curtained sprayer with ourtains of both kinds. It should be noted that in the use of the modification shown in Fig.

5'the outer, shorter curtain 18 is brought into close proximity to the surface being treated owing to the fact that the protruding ends of the'bristlesreadily bend :over under pressure. If at any time in the operation of the devlce the openings 6, 6 should become clogged they canbe readily cleaned by the insertion I I 1 nesses.

of a wire or similar instrument.

I have provlded the opemngs with flaring mouths 7 so' that an instrument of this kind can be infabric or both, which effectively prevents any loss by evaporation as well as intercepts and returns to the surface under treatment any portions of the liquid that may have re ounded therefrom by splashing. When the curtain is madeof woven fabric and has been treated to render it impervious to liquids, any escape of the remover through it 'is, of course, absolutely prevented. But

even when using a curtaln'of this kind, been so treated, and in the which has not use of a bristle curtain merely, enough solid matter is deposited thereon in the course of a short while to prevent substantially entirely the passage of any part of the fluid solvents. l 7

What I claim and desire to cover by Letters Patent is: L

1. A process of the character described, consisting in conveying the liquid paint or varnish remover from a source of supply, then applying it to the surface to be treated without the escape of any part thereof.

2. A process of the character described, consisting in conveying the liquid paint or varnish remover fromasource of supply,

then applying it to the surface to be treated.

part thereof by Without the loss of any evaporation.

3. A process of the character-described, consisting in conveying the liquid paint or varnish remover from a source of supply, then projecting it upon the surface to be treated while preventing any loss by splashm I it. A processof the character described, consistingin conveying the liquid paint or varnish remover from a source of supply and applying it to the surface to be treated by passing it throu h a'covered passageway so as to avoid any Ioss by evaporation, splash-' ing or otherwise. s

In testimony whereof, I have hereunto signed my name in the presence of two wit- OARLETON ELLIS.

Witnesses:

SAMUEL R. BELL, HARRY W. BROWN. 

